Category:E. B. Judson

Media in category "E. B. Judson"

The following 3 files are in this category, out of 3 total.

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  Colored radio recorder is latest in radio receivers. E.B. Judson of the Bureau of Standards and his two colored radio recorder, automatically recording signals in two colors, red and black. LCCN2016889081.jpg 7,752 × 10,008; 8.04 MB
  
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  Colored radio recorder is latest in radio receivers. E.B. Judson of the Bureau of Standards and his two colored radio recorder, automatically recording signals in two colors, red and black. LCCN2016889081.tif 7,752 × 10,008; 147.98 MB
  
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  NO CAPTION LCCN2016887723.jpg 10,020 × 7,416; 12.35 MB